Fluid dispensing apparatus



FLUID DISPENS ING APPARATUS Filed NOV. 5, 1935 5 Sheets-Sheet l HGI.

//V VE/VTOE:

CARL ro/v L .Mc MUL LEN, B)

Nov. 16, 1937; c. L. M MULLEN 2,099,129

FLUID DISPENSING APPARATUS Filed Nov. 5, 1935 5 Sheets-Sheet 3 IIQJI.

Nov. 16, 1937. c. L. McMULLEN 2,099,129

FLUID DISPENSING APPARATUS Filed NOV. 5, 1935 5 SheetsSheet 4 Nov. 16,1937. c, MCMULLEN FLUID DISPENSING APPARATUS Filed Nov. 5, 1935 HQ IX 5Sheets-Sheet 5 CHEL 701v L McMz/L L EN,

Patented Nov. 16, 1937 UNITED STATES PATENT OFFICE 3 Claims.

This invention is an improvement upon the invention described andclaimed in my copending application Serial No. 34,879 filed August 6,1935, for Letters Patent of the United States for Improvement in fluiddispensing apparatus, and is particularly applicable to apparatusincluding a meter through which gasolene or other fluid is forced, by apump or other suitable means, to and through a flexible dispensing hose.Said meter is operatively connected with registering mechanismindicating the volume of fluid dispensed. In gasolene dispensingapparatus, such indication is conventiently in gallons and fractions ofa gallon, but in gas apparatus is preferably in cubic feet.

In that apparatus, I provide means for identifying each individualdispensing operation with an individual serial number, and provide meansto not only make a record of each such operation and the volume of fluiddispensed thereby, for the owner of the fluid used, but also duplicatethat record upon a receipt for delivery to the customer, each suchrecord and receipt having imprinted thereon not only the individualserial number of the instant transaction but also the serial number ofthe immediately preceding dispensing transaction to prevent anydispensing operation without a record thereof in its consecutive order.Such record of each sales transaction is begun by imprintingsimultaneously upon the owners record and the customers receipt theserial number of the preceding sale; that im print being made before theinitiation of the instant dispensing operation; it being impossible toimprint the serial number for the instant sale record until thedispensing operation is actually begun.

In that apparatus, as is usual in dispensing apparatus, the operatormust watch the indicating mechanism to determine when the desired volumeof fluid has been dispensed and then manually stop the flow of fluid.Therefore, it is the object and effect of my present invention to savethe time and labor of the operator in thus continually watching andmanually controlling the dispensing operation, by providing meanswhereby the operator may instantly predetermine the volume of fluidwhich is to be dispensed by setting mechanism which will thereuponautomatically control the flow of the fluid and stop such flow when theproper amount of fluid has been dispensed.

My invention includes the various novel features of construction andarrangement hereinafter more definitely specified.

In said drawings, Fig. I is a fragmentary front elevation of fluiddispensing apparatus conven iently embodying my invention.

Fig. II is a front elevation of the flow controlling and registeringmechanism indicated at the upper left hand portion of Fig. I but on alarger scale and with the casing shown in Fig. I removed.

Fig. III is a rear elevation of the mechanism shown in Fig. II.

- Fig. IV is an elevation of said mechanism as seen from the right handside of Fig. II and the left hand side of Fig. III.

Fig. V is a plan view of said mechanism shown in Figs. II to IVinclusive and including at the lower left hand corner thereof the knobshown at the right of the casing in Fig. I, which is for resetting theregistering mechanism to zero, and also showing the slide bar foroperatively con necting the flow control mechanism with the valveindicated in Fig. I.

Referring to Fig. I; i is a casing of a meter from which fluid isdispensed through the pipe 2 under control of the valve 3. The adapter 4which is rigidly connected with the top of said meter casing,conveniently by internal screw means, supports the casing 5 whichcontains in the lower portion thereof the mechanism for registering thevolume of fluid dispensed through said meter and in the upper portion 6thereof contains the mechanism for controlling the flow of said fluidand predetermining the volume dispensed at any operation. Said casing 5has the window 8 with openings 9 and I0 through which there are visiblydisplayed numerals H and I 2 respectively indicating the number oftenths of a gallon and gallons of fluid dispensed at the currentoperation. Said window also has the opening 13 through which are visiblydisplayed numerals l4 indicating the total aggregate volume of fluidwhich has been dispensed by successive operations. Said numerals II areincluded in a circumferential series on a decimally numbered wheel l6and said numerals I! are included in respective circumferential serieson decimally numbered wheels l1. Said numerals H are respectivelyincluded in circumferential series on decimally numbered wheels l8.

Said wheels i6 and I! may be set back to zero position at the end ofeach dispensing operation by means of the knob 20 projecting from theright hand end of said casing 5, as shown in Fig. I; but without settingback the wheels I 8 which are advanced in correspondence with everyadvancement of the wheels I6 and I1.

The fiow control mechanism includes the four knobs 2 l, 22, 23, and 2 5,each provided with a circular and decimal series of numeralsrespectively indicating gallons, tens of gallons, hundreds of gallons,and thousands of gallons. Said knobs M to 2 A inclusive are respectivelyrigidly connected with shafts 25, 21!, 2t, and 2a which are journaled inthe part b of the casing 5 and connected within the latter with elementsof the flow controlling mechanism hereinafter described, which controlssaid valve t'by the slide bar 3t. Said bar 36 is manually shifted to theright as in Fig. I to open said valve, and automatically released andshifted to the left, to the extent indicated by the dotted lines in Fig.I, to close it, when the quantity of fluid predetermined by manuallysetting said knobs 2i to 26 inclusive is dispensed past said valve 3.

As shown in Fig. I, each of said knobs 2|! to 2 5 is in the normal zeroposition with respect to respective index marks ii on said casing member6, but may be turned to present in registry with the respective indexmarks the numerals on the knobs which will represent the quantity thuspredetermined to be dispensed. In the form shown,

said knobs are graduated and numbered so as to predetermine the deliveryof fluid only in whole gallons. However, any fractional part of a gallonmay be delivered by manually operating said valve 3 independently of theflow control mechanism.

As shown in Fig. I, the slide bar 30 is at the extreme right hand end ofits movement limited by the collar 32 on said bar coming in contact withthe left hand end of the casing5. The spring 3i, shown in Figs. II andV, continually stresses said bar 30 toward that position. Said bar 30 isconnected by the coupling 34 with the rod. 35, the opposite end of whichis connected by the pivot 36 with the toggle links 31 and 3B. The link31 is connected at its lower end by the pivot 39 with the casing of saidvalve 3. The link 38 is connected at its upper end by the pivot 40 withthe stem 3' of said valve 3 so that, in the position shown, said valveis held open against the stress of the spring 4| which continually tendsto shut it, and which is stronger than said spring 3|. The lever 42 isfulcrumed at 43 on the bracket 44 supported by said valve casing, toenable the operator to open said valve, against the stress of saidspring 4|, to permit thefluid to be dispensed, after the operator hasturned said knobs 2| etc. to predetermine the quantity to be dispensed.

Until automatically released-as hereinafter de scribed, said valve 3 isheld in the open position shown in Fig. I by the latch 45 which is alever fulcrumed on the pivot stud 46 supported by the frame 41; whichlatch engagesthe shoulder 48 formed by recessing the lower side of saidbar 30. Said latch is upheld in engagement with said rod by the spring49. The upper end of said spring is connected with the bracket 50 on theframe member 5| which is rigidly connected with and supported by saidframe 41. The lower end of said spring 49 is connected with the pawl 52which, as shown in Fig. IV, is connected by the pivot 53 with the righthand end of said latch 45.

The power to automatically operate the mechanism above contemplatedisderived from the flow of the fluid through said meter casing I undercontrol of said valve 3; which flow turns the meter shaft 55 indicatedin Fig. IV one revolution for each gallon of fluid dispensed. Said shaft55 has at its upper end the coupling mema ea, ran

naled in the bearing 59, part of the base plate 66 of said frame ll.

Said shaft 58 has fixed upon its upper end the gear wheel M which is inmesh with the gear 62 journaled on the stud shaft 53 carried by thebracket M which is bifurcated as indicated at 65, and clamped upon'thebearing 56, part of said frame base 65, by means of the screw Blindicated in Fig. IV. Said gear 52 is in mesh with the gear 65 which isfixed on the shaft it which is journaled in said bearing 56 and in thebearing ll projecting inwardly from said frame M, as shown in Fig. V.

Said shaft it has, rigidly connected therewith, the bevel gear it inmeshwith the bevelgear 74 on the shaft l5 journaled in the bracket l6projecting inwardly from said frame M, as shown in Fig. V. Said shaft l5has fixed upon its other end the bevel gear ll in mesh with the bevelgear 18 which is fixed on the shaft which is journaled in said frame Mand in the frame til extending upwardly in unitary relation with saidbase plate 60 of the frame 471. Said shaft 119 has fixed thereon thegear 82in mesh with the gear 83. As shown in Fig. II said gear 83 hasthe hub 84 carrying said decimally numbered wheel it, indicating tenthsof a gallon, and is loosely journaled on the shaft 85, which latter issupported in hearings in said frame members 41 and 80. The proportionsof the gears aforesaid are such that said Wheel 6",lS turned, onerevolution for each gallon of fluid dispensed, like said meter shaft 55.

Said wheel l6 carries at the left hand side thereof in Fig. 11, two gearteeth 86 which are adapted to successively engage the eight teeth on thegear 81, indicated in Fig. IV, which is loosely journaled on the shaft88. The teeth of said gear 81 are'continually in mesh with the gear 89on the first register wheel 'I'I adjoining said wheel iiiv and whichbears a circumferential decimal series of numerals each representing onegallon advance. Every other tooth on said gear 81 is extended so thatwhat is the right hand end of said gear in Fig. II presents but fourteeth in registry with the cylindrical edge I6 on said wheel l6 so thatsaid wheel I! is prevented from turning by engagement of two of the fourteeth upon said cylindrical edge l6 of the wheel l6, except when thelatter presents its two teeth to turn the gear 81.

Said wheel I6 is conveniently numbered in red. Each of said wheels I Iis decimally numbered like the wheel l6, but conveniently in black. Eachdigit on the first wheel l'l represents one gallon. The numerals on thesecond wheel ll represent tens of gallons. The numerals on the thirdwheel I! represent hundreds of gallons, and the numerals on the fourthwheel I! represent thousands of gallons. The construction andarrangement are such that when said shaft 55 is turned one revolution,said numbered wheel I 6 is turned one revolution, and the two teethcarried by the latter operate to advance the adjoining numbered wheel I!one digit, thus indicating that one gallon of fluid has been dispensedby the instant operation. The other three numbered wheels I! in saidseries are similarly connected by gears like the gears 81 and 89 so thatthe total number of gallons dispensed during the instant operation ismanifested by the numbers on said wheels I6 and I1 shaft 92 Said gear 82on the shaft 19 is also in mesh with the gear 9| which is looselyjournaled on the supported by said frame members 41 and 80. Said gear 9|has, rigidly connected therewith, the cylindrical disk 93, indicated inFigs. II and V, which carries the two teeth 94 which are adapted tosuccessively engage the eight teeth on the gear 95 indicated in Figs. IVand V. Said gear 95 is loosely journaled on the shaft 95 which issupported in said frame members 41 and 80. The teeth of said gear 95 arecontinually in mesh with the gear 98 shown in Figs. II and V on thefirst register wheel I8, which bears a circumferential decimal series ofnumerals I4 each representing one gallon advance. Every other tooth onsaid gear 95 is extended so that what is the right hand end of said gearin Fig. II presents but four teeth in registry with the cylindrical disk93 on said gear 9| so that said wheel I8 is prevented from turning byengagement of two of the four teeth of said gear 95 upon saidcylindrical disk 93 on the gear 9| except when the latter presents itstwo teeth 94 to turn said gear 95.

The other five numbered wheels I8 in said series are similarly connectedby gears like the gears 95 and 98 so that the total number of gallonsdispensed by the aggregate of successive dispensing operations ismanifested by the numbers on said wheels I8 displayed through theopening I3 at said window 8 shown in Fig. I.

Said shaft 10 has rigidly connected with the upper end thereof the bevelgear I in mesh with the bevel gear IOI which is fixed on the shaft I02journaled in the bearing I03 which is rigidly connected with the frameplate I04 rigidly connected with the frame members 5| and 5| which arerigidly supported by said frame 41, as indicated in Fig. III. Said shaftI02 carries at its right hand end the gear I05 in mesh with the gear I06on the shaft I01 which is journaled in said plate I04 and in the plateI08 likewise supported by said frame 41. Said. shaft I0? has, rigidlyconnected therewith, the worm I09 indicated in Figs. III and V, which isin mesh with the worm gear I I0. Said gear III is loose on the shaft IIIwhich is journaled in said frame members 5| and 5|.

Said gear H0 is in integral relation with the sleeve II2, the spiralgear H3, and the cylindrical disk I|4 which has two teeth I I5 whichsuccessively engage the eight teeth on the gear I It. Said gear I I6 isloose on the shaft |I8 which is supported and stationary in said bearingmem bers 5| and 5| as indicated in Fig. III. The

teeth of said gear II 6 are continually in mesh with the gear I20 on thesleeve |2I which is in integral relation with'the spiral gear I22 andthe cylindrical disk I23. Every other tooth on said gear H6 is extendedso that What is the left hand end of it in Fig. III presents but fourteeth in registry with the cylindrical edge of said disk II4 carried bysaid sleeve II2, so that said gear I20 and the parts aforesaid inintegral relation therewith are prevented from turning by engagement oftwo of the four teeth of said gear II6 upon said cylindrical edge of thedisk II4, except when the latter presents its two teeth II5 to turn saidgear I|6.

Said disk I23 has two teeth I24 which successively engage the eightteeth on the gear I25, which is like the gear H6 and which iscontinually in mesh with the gear I26 on the sleeve I21 which is inintegral relation with the spiral gear I28 and the cylindrical disk I29.Said disk I29 has two teeth I30 which successively engage the .eightteeth on the gear I3I which is also like said gear 6 and is continuallyin mesh with the gear I32 on the sleeve I33 which is in integralrelation with the spiral gear I34.

Said sleeves I2I, I21 and I33 are each loosely mounted on said shaft IIIlike the sleeve II2. Said spiral gears II3, I22, I28, and I34 arerespectively in mesh with the spiral gears I36, I31, I38, and I39 whichareloosely mounted on the respective shafts 26, 21, 28, and 29 of themanually rotary knobs 2| to 24 inclusive shown in Fig. II. Said spiralgears I36 to I39 inclusive are respectively rigidly fixed (by the setscrews shown in Fig. V) on the hubs of the respective stop cams I4I,I42, are journaled in the frame plate I08 which is rigidly connectedwith said frame members 5| and 5|. See Figs. III and V.

The construction and arrangement last above described are such that saidstop cams I4I to I44 inclusive are turned in definite relation to thedispensation of fluid through said valve 3, by the described gear meansconnecting them with the meter shaft 55.

Said stop cams I4I, I42, I43, and I44 have respective cam recesses I4I',I42, I43, and I44, which in the initial zero position of said knobs 2|to 24 inclusive are presented upwardly, as indicated in Fig. V, andreceive the complementary projections on the respective setting camsI45, I46, I41, and I48, as shown in Fig. V. Said shafts 26 to 29inclusive have respectively fixed thereon perforated setting collarsI50, I 5| I52, and I53. Each of said collars has a circular series ofperforations respectively marked I50, I5I', I52, and I53 in Figs. II andIII, correspending with the circular decimal series or numbers on saidknobs 2| to 24 inclusive, as shown in Fig. II. Directly beneath each ofthe shafts 26 to 29 inclusive are respective stationary studs 26', 21,28, and 29'; which studs are fixed in the frame plate I04 so as tonormally project into the lowermost perforation of the respectivecollars I50 to I53 inclusive. Said collars and the shafts and settingknobs with which they are connected are respectively continuallystressed axially toward the left in Fig. V by respective springs I54,I55, I56, and I51 interposed between the respective collars and theadjoining spiral gears I36 to I39 inclusive. Said setting cams I45 toI48 inclusive are respec- I43, and I44, which hubs tively rigidlyconnected with the shafts 26 to ting cams I45 to I48 inclusive ride uponthe plane surface at the right hand end of the respective stop cams I4Ito I44 inclusive, with reference to Fig. V.

The oscillatory tappet frame compris'ng the member I6I extending inopposition to each of said shafts 26 to 29 inclusive, as indicated inFig. III, has lever arms I62 and I63 pendent from the rock shaft I64with which they are rigidly connected, as indicated in Fig. III, andsaid shaft is journaled at its ends in the frame brackets 50 and 50, asshown in Fig. V. I find it convenient to provide said tappet framemember I6| with tappet screws I6I provided with jamb nuts so that saidscrews may be set in contact with the adjacent ends of said setting knobshafts 25 to 29 inclusive, so that. any axial movement of any of saidshafts to the right in Fig. V will displace said tappet frame to theright and hold it in such displaced position until each of said shaftshas been restoredto its initial axial position shown in Figs. IV and Vby dispensation of the volume of fluid for which the control mechanismhas been set. As shown in Fig. III, said tappet frame has projectingfrom its lever arm iii? the screw stud H55 which, as shown in Fig. IV;extends through the slot 52' in the pawl 52 and whenever any of saidshafts 26 to 29 inclusive is axially displaced for a predetermineddispensing operation, said pawl is thus held with its tripping point outof the path of the tripping cam Hit.

Said tripping cam W6 has the recess itii, indicated in dotted lines inFig. IV, to receive the tripping point of said pawl 52 when the latteris ,released by the inward rocking movement of said tappet frame, understress of the spring 33, when said setting cams M5 to M8 inclusive arepermitted to move axially into the recesses of said stop cams when thelatter have been turned by the operation of the meter to dispensethrough the valve 3 the volume predetermined by the manual adjustment ofthe knobs ii to 2d inclusive.

Said tripping cam itii is loose on said shaft i i i but adapted to beturned by its gearing connec- I tions with said meter shaft 55, indefinite relation to the amount of fluid dispensed through said valve 3.Such gearing connections include the bevel gear iti which is fixed onsaid cam and in mesh with the bevel gear I68 on the shaft M2 which isjournaled in the bearing Hi3 supported by said frame plate Hi l, asindicated in Fig. V, and has fixed on its inner end the bevel gear illiin mesh with said bevel gear iilfl on the shaft i which, as abovedescribed, is turned by its gearing connections with said meter shaft55. The construction and arrangement above described are such that whenthe predetermined volume for which the flow control mechanism aforesaidwas set has been dispensed through said valve 3, said pawl 52, which hasbeen dropped into said recess I66 slightly in advance of that event, ispushed down by the final turning movement of said trip- :ping cam I65 torelease said latch 45 from the.

slide bar 30 and thus permit said valve 3 to be shut by its spring M atthe instant the precise volume predetermined for dispensation has beendispensed.

It is to be particularly noted that the knobs 2i to 24 inclusive remainin the position to which they are manually set, until they are manuallyreset; so that the numerals thereon representing units of volume, incooperation with the index marks 3i on said casing member 6 shown inFig. I, may be observed not only by the operator but by the customer,and manifest the volume of fluid which has been dispensed, incorrespondence with the registration of said decimally numbered wheelsiii and ill shown in Figs. I and II. Moreover, said wheels may be resetto their zero position shown in Figs. I and II without disturbing themanifestation of the knobs 2i to 24 inclusive of the quantity which haslast been dispensed. Such resetting of the registering mechanism iseffected by manually turning clockwise said knob 2|] which is shown inFigs. I and V. Said knob 20 is rigidly connected with the shaft 85 onwhich is fixed the bevel gear I12 which is in mesh with the bevel gearM3 on the ,shaft i'i i acoaiaa j'ournaled in the brackets H5 and litshown in Figs. IV and V which are rigidly connected with the frame i'i;said bracket H5 being directly connected with the base plate Bil of saidframe. Said shaft Hi l has fixed on its opposite end the bevel gear illin mesh with the bevel gear lit which is fixed on the end of said shafti i i. Consequently, when said knob 25 is turned clockwise, said shafts85 and iii are simultaneously turned clockwise at the same rate. Each ofsaid decimally numbered wheels iii and ill and the spiral gear wheelsH3, i22, H28, and i3 3 and the tripping cam ifiii are provided withinternal one-way clutch means by which they are engaged with theirrespective shafts 35 and iii to turn them backward to zero position as aconsequence of the clockwise turning movement of said knob 28; therestoration of all of said wheels to the zero position being manifestedby the zero marks on the wheels it and iii when presented as shown inFigs. I and II. However, I find it convenient to provide means forindicating to the operator by a clicking noise when said wheels havebeen thus restored to zero position; which means are shown in Figs. IVand V including the collar lilo fixed on the shaft 85 and having thenotch M0 to receive the end of the click lever i82 which is convenientlyloosely fulcrumed on the bearing H33 projecting from said frame ii inrigid relation therewith, as indicated in Fig. V. Said click lever iscontinuously stressed to engage the notch Mill in said collar I80 by thespring 35 which extends from the right hand end of said lever M2 inFigs. IV and V to the stud I86 fixed on said frame 41!.

The mechanism above described may be operated as follows: With all ofthe decimally numbered wheels and knobs in the zero position shown inFig. II, the operator may dispense any desired quantity of fluid throughthe valve 3 by manually opening the latter by the lever 42 to theposition shown in Fig. I, with the effect of manifesting by the registerwheels l6 and ii any amount dispensed from one-tenth of a gallon to tenthousand gallons, without any predetermination of the amount dispensed.However, by manually turning the knobs 2i to 24 inclusive, the operatormay predetermine and limit the volume of fluid to be dispensed at anydispensing operation from one gallon to ten thousand gallons. I find itconvenient to leave said knobs 2i to 24 inclusive in any position towhich they have been previously set, until it is desired to effect asucceeding dispensing operation and to then manually adjust them whilethe valve 3 is shut and before initiating the dispensing operation, thevolume of which is to be thus predetermined. The operator may thus savesome time in manipulation of the flow control in successively dispensingthe same predetermined volume offiuid, for instance five or ten gallons;each such dispensing operation being, of course, automaticallyterminated upon completion of the dispensation of the volume of fluidfor which said knobs 2! to 24 inclusive are set.

When the form of my invention chosen for illustration is embodied in agasolene or other liquid dispensing apparatus of the curbstand type;said valve 3 is permanently connected, conveniently by the pipe 2 with aflexible hose having at the discharge end thereof a nozzle provided witha manually operative valve so that the operator may control thedischarge of fluid at such nozzle whenever'the valve 3 is open. However,when that form of my invention is embodied in a tank truck for what isknown to the trade as bulk delivery of gasolene, lubricating oil, orother liquid, it is usual to provide the pipe 2' with a coupling withwhich a flexible delivery hose may be detachably connected. When theform of my invention shown is embodied in a gas or water distributionsystem, the pipe 2' may be rigidly connected with gas burners or waterfaucets through which the fluid is to be distributed.

Therefore, I do not desire to limit myself to the precise details ofconstruction and arrangement herein set forth, as it is obvious thatvarious modifications may be made therein without departing from theessential features of my invention, as defined in the appended claims.

I claim:

1. The combination with a shaft; of adjust able tripping mechanism forpredetermining a number of revolutions of said shaft,.including amanually rotary member which must be moved axially to free it forrotational movement to set it with reference to a series of numerals,detent means for temporarily detaining said manually rotary member inany selected position in which it is set, and means for automaticallyreleasing said manually rotary member and permitting it to move axiallytoward its original position after the predetermined number ofrevolutions of said shaft.

2. The combination with a shaft; of adjustable tripping mechanismfor-predetermim'ng a number of revolutions of said shaft, including aseries of manually rotary members with respective axially movableshafts; setting cams respectively rigidly connnected with said shafts indefinite relation with numerals on said manually rotary members; stopcams mounted to rotate in respective coaxial relation with said settingcams; spring means local to each of said shafts for thrusting the latteraxially with their setting cams in contact with said stop cams; wherebysaid manually rotary members are held in the axial position to whichthey are selectively adjusted, until the stop cams are turned to apredetermined limit, when, by the movement of said stop cams, saidspring means are permitted to restore said shafts and setting cams totheir initial axial position.

3. The combination with a shaft; of adjustable tripping mechanism forpredetermining a number of revolutions of said shaft, including a seriesof axially movable shafts, each having rigidly connected therewith amanually rotary member provided with a circular series of numerals and asetting cam in definite relation with the numerals on the respectiverotary member; spring means for restoring said shafts and setting camsto their initial axial position; a slide bar; a latch for holding andreleasing said slide bar; means for manually engaging said slide barwith said latch; a pawl pivotally connected with said latch; a cam fortripping said pawl and moved in accordance with the revolution of saidfirstnamed shaft; a spring continually stressing said pawl towardengagement with said tripping cam; and an oscillatory tappet framehaving a member extending in opposition to each of said shafts at thecam ends thereof and pivotally connected with said pawl; whereby saidpawl is held out of engagement with said tripping cam, by said tappetframe, whenever any one of said shafts is displaced from its zeroposition, and said pawl is released and tripped by said tripping cam torelease said slide bar when the predetermined number of revolutions ofsaid first-named shaft for which said manually rotary members have beenselectively set have been effected.

CARLTON L. MCMULLEN.

